fix RTL layout issues

frontend/src/app/components/pool-ranking/pool-ranking.component.ts

@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, Component, Input, NgZone, OnInit } from '@angular/core';
+import { ChangeDetectionStrategy, Component, Input, NgZone, OnInit, HostBinding } from '@angular/core';
 import { FormBuilder, FormGroup } from '@angular/forms';
 import { Router } from '@angular/router';
 import { EChartsOption, PieSeriesOption } from 'echarts';
@@ -31,6 +31,8 @@ export class PoolRankingComponent implements OnInit {
   };
   chartInstance: any = undefined;
 
+  @HostBinding('attr.dir') dir = 'ltr';
+
   miningStatsObservable$: Observable<MiningStats>;
 
   constructor(